Year	Per 100 People
1960	1.17171
1975	3.29915
1980	3.39756
1981	3.31228
1982	3.22265
1983	3.26197
1984	3.65302
1985	3.90767
1986	4.99286
1987	7.04367
1988	9.17787
1989	12.38786
1990	15.7868
1991	16.79557
1992	19.04154
1993	20.44657
1994	21.1257
1995	23.14099
1996	23.90968
1997	26.20597
1998	27.12888
1999	29.01067
2000	30.85545
2001	32.15545
2002	32.85406
2003	31.88669
2004	31.85883
2005	26.64038
2006	26.82769
2007	27.54233
2008	27.49832
2009	27.16499
2010	27.10146
2011	26.71616
2012	26.28625
2013	26.99015
2014	25.6478
2015	25.30728
2016	24.95038
2017	30.13309